Filter
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2-9
(3) Auxiliary control-power input terminals (R0 and T0)
The inverter operates even if power is not
provided to these terminals.
If a protective circuit operates and the
magnetic contactor on the inverter power
side is opened (off), the inverter control circuit
power, the alarm output (30A, B, and C), and
the keypad panel display goes off. To prevent
this, the same AC power as the main circuit
AC power must be supplied (as auxiliary
control power) to the auxiliary control-power
input terminals (R0 and T0).
① To ensure effective noise reduction when
using a radio noise filter, the output power
from the filter must go to the auxiliary
control-power input terminals.
P1
P(+)
L1/R
L2/S
L3/T
Magnetic
contactor
Noise filter
RCD
Power supply
R0
T0
Inverter
+
+
DC/DC
Inverter
control power
Insulation Transformer
Fig. 2-3-5 Connecting the auxiliary control-power input terminals
If these terminals are connected to the input side of the filter, the noise reduction effect deteriorates.
② When the RCD (Residual-current Protective Device) is installed (G11S:30HP or less), the terminal R0 and
T0 should be connected to the OUTPUT side of the RCD. If they are connected to the input side of the
RCD, RCD will be malfunction because the power supply of the inverter is three phase and the terminal R0
and T0 is single phase.
When the terminal R0 and T0 are connected to the INPUT side of the
RCD, the insulation transformer is required to install as shown on the
Fig. 2-3-5.
(4) DC reactor connecting terminals (P1 and P (+))
① Before connecting a power-factor correcting DC reactor (optional) to
these terminals, remove the factory-installed jumper.
② If a DC reactor is not used, do not remove the jumper.
Note:For inverter of 100HP or more, the DC reactor is provided as a
separate standard component and should always be connected to the
terminals.
Fig. 2-3-6
(5) External braking-resistor connecting terminals (P (+) and DB) (G11S:10HP or less)
For the G11S of 10HP or less, a built-in braking resistor is connected to terminals P (+) and DB.
If this braking resistor does not provide sufficient thermal capacity (e.g., in highly repetitive operation or heavy
inertia load operation), an external braking resistor (option) must be mounted to improve braking performance.
① Remove the built-in braking resistor from terminals P(+)
and DB. Insulate the resistor-removed terminals with
adhesive insulation tape, etc.
② Connect terminals P(+) and DB of the external braking
resistor to terminals P(+) and DB of the inverter.
③ The wiring (cables twisted or otherwise) should not
exceed 16ft (5m).
(6) DC link circuit terminals (P (+) and N (-))
The G11S inverter of 15HP or more does not contain a
drive circuit for the braking resistor. To improve braking
P1 P(+)
DBR
DB N(-)
DC reactor
(DCR)
External braking resistor (DB)
PDB
2
1
(THR)
(P24)
[ x x ]
Fig. 2-3-7 Connection (G11S:10HP or less)
performance, an external braking unit (option) and an external braking resistor (option) must be installed.
① Connect terminals P(+) and N(-) of the braking unit
to terminals P(+) and N(-) of the inverter. The
wiring (cables twisted or otherwise) should not
exceed 16ft(5m).
② Connect terminals P(+) and DB of the braking
resistor to terminals P(+) and DB of the braking
unit.
The wiring (cables twisted or otherwise) should not
exceed 33ft (10m). When terminals P (+) and N (-)
of the inverter are not used, leave terminals open.
If P (+) is connected to N (-) or the braking resistor
is connected directly, the resistor will break.
③ Auxiliary contacts 1 and 2 of the braking unit have
polarity. To connect the power regeneration unit,
refer to the "Power Regeneration Unit Instruction
Manual".
DC reactor
(DCR)
P1 P(+) N(-)
External braking resistor (DB)
P
DB
P
P
N
Braking unit (BU)
1
2
1
2
DB
(THR)
(P24)
Fig. 2-3-8 Connection (G11S:15HP or more)